Texas Instruments TPS56300PWP

Overview

TPS56300PWP from Texas Instruments is a dual-output synchronous-buck controller IC designed for powering DSP and microcontroller core/I/O rails. It integrates a fast hysteretic ripple regulator (core) and an external-NMOS LDO controller (I/O), supports 2.8 V–5.5 V input, ±1.5% reference accuracy, and programmable VID-based voltage pairs from 1.3 V/1.5 V to 2.5 V/3.3 V. Used in TI C6000-family DSP power systems.

For engineers reviewing the TPS56300PWP datasheet, TPS56300PWP pinout, TPS56300PWP application, or TPS56300PWP equivalent, key selection criteria include dual-rail sequencing control, lossless high-side current sensing, droop compensation, open-drain PWRGD monitoring both outputs, and compatibility with logic-level N-channel MOSFETs across full input range.

Technical Context

The TPS56300PWP implements a dual-loop architecture: a hysteretic ripple regulator for fast transient response on the core rail, and a feedback-controlled LDO controller driving an external N-channel MOSFET for I/O regulation. Both loops share a tri-level VID network enabling simultaneous, matched slow-start and voltage sequencing.

It features adaptive deadtime control, integrated 2-A peak gate drivers (high- and low-side), internal synchronous bootstrap rectifier, and lossless current sensing via high-side R_DS(on) detection. Protection includes OVP/UVP on both outputs, adjustable overcurrent shutdown, thermal shutdown at 145°C, and inhibit-controlled low-I_Q mode.

Key Specifications

Pinout & Package

TPS56300PWP uses the 28-pin PowerPAD™ TSSOP (PWP) package with exposed thermal pad for enhanced thermal performance. The PowerPAD must be soldered to PCB copper for effective heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output controller applications.

Compared with TPS56200PWP and TPS563201DDA, the TPS56300PWP uniquely combines programmable dual-rail control, external LDO flexibility, VID-based voltage selection, and lossless current sensing - making it optimal for high-performance, configurable DSP and microcontroller power systems.

Availability

TPS56300PWP is available at Aetrix Electronics and suitable for DSP power supplies, industrial microcontroller systems, FPGA I/O regulation, and test equipment power management requiring stable component supply and long-term design continuity.

Supply support for TPS56300PWP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with decades of DSP power architecture expertise.

The TPS56300PWP belongs to TI's high-performance power controller product line, engineered specifically for multi-rail, low-voltage DSP and microcontroller applications demanding precise sequencing, fast transient response, and robust protection.

FAQ

What is the primary function of the TPS56300PWP in a power system?

The TPS56300PWP serves as a dual-output programmable controller IC that simultaneously regulates a DSP or microcontroller core rail using a fast hysteretic buck topology and an I/O rail using an external-NMOS LDO controller. Its integrated VID interface, slow-start, and PWRGD output enable fully coordinated power-up of both rails without external sequencing components - a key requirement in TI C6000-family and similar high-speed digital systems.

How does the TPS56300PWP achieve voltage sequencing between core and I/O rails?

The TPS56300PWP achieves precise voltage sequencing through its shared SLOWST pin: a single capacitor connected from SLOWST to ANAGND sets the ramp time for both the ripple regulator (core) and LDO controller (I/O). This ensures simultaneous, matched voltage rise - critical for avoiding latch-up or bus contention in DSPs and microcontrollers. The VID network further guarantees that both rails scale proportionally according to the selected voltage pair.

Can the TPS56300PWP support output voltages outside the standard VID table values?

Yes, the TPS56300PWP supports non-standard output voltages via external resistor dividers from V_OUT to VSEN−RR or VSEN−LDO and then to ANAGND. The datasheet confirms this capability in Table 1 notes and the "detailed description" section. For example, a custom 1.65 V core rail can be set independently of the VID code, while retaining all regulation, protection, and sequencing functions of the TPS56300PWP.

What protection features are built into the TPS56300PWP?

The TPS56300PWP includes overvoltage protection (OVP) and undervoltage protection (UVP) on both outputs, adjustable overcurrent shutdown triggered via the OCP pin, thermal shutdown at 145°C, and INHIBIT-controlled low-power state. Each protection feature has defined thresholds (e.g., OVP trips at 115% V_REF, UVP at 75% V_REF) and deglitch timing (e.g., 2.25–11 µs), ensuring robust fault handling without nuisance tripping during transients.

Does the TPS56300PWP require external MOSFETs, and what type are supported?

Yes, the TPS56300PWP requires external N-channel MOSFETs: two for the synchronous buck (high-side and low-side) and one for the LDO pass element. It is explicitly designed to drive logic-level N-MOSFETs across the full 2.8 V–5.5 V input range, with integrated 2-A peak gate drivers and internal synchronous bootstrap rectifier for high-side drive - eliminating need for external bootstrap diodes or level shifters.